A local magic shop has a monopoly on the production of magic wands. Each customer wants only one magic wand, and the table below shows each customer's willingness to pay. The marginal cost of producing a wand is $9no matter how many are produced.

Quantity demanded 0 1 2 3 4 5 6 7 8

Price per wand ($) 30 27 24 21 18 15 12 9 6

Part 1

If the shop can charge only a single price, it will charge$ and sell wands.

Part 2

If the firm practices perfect price discrimination, it will sell a total of wands and earn a profit of $______.